Biology Question Bank for Entrance Exam – Biomolecules

Biology Question Bank for Entrance Exams

For AIPMT Main other Medical Entrance Exam Prepration, Question Bank for Biology Biomolecules is given below.

Biomolecules-1

IMPORTANT POINTS

The Substances which are formed due to bond formation between C and H are called organic substances. A carbohydrate molecule contains Carbon, Hydrogen, and Oxygen. The ratio of H and O is generally 2 : 1 as water (H2O)

-Carbohydrates have the general formula of Cn(H2O)m.
-Carbohydrates can be divided into three main types. These are,

Monosaccharides (single sugar unit)

Disaccharides (two sugar unit)

Polysaccharide (many sugar unit)

-Different monosaccharides contain different numbers of carbon atoms.

Trioses contain three, Pentoses contain five, and Hexoses six.

-Carbohydrates have many different functions and come in many different forms.

-Ribose and Deoxy ribose are both pentose monosaccharide and are found in RNA and DNA.

-Lipids are of three types, i Simple lipids

ii Complex lipids

iii Steroids.

-Lipids are the food stuffs of highest Calorific value and they are stored in the body as a reserve food

a) P i Q iii R ii S iv

b) P iv Q iii R ii S i

c) P iii Q i R iv S ii

d) P i Q iii R ii S iv

3. Match the terms in column-I with suitable terms in column-II.

Column – I Column – II

P Butyric acid i Long chain Unsaturated fatty acid

Q Stearic acid ii Short chain Unsaturated fatty acid

R Oleic acid iii Short chain Saturated fatty acid

S Crotonic acid iv Long chain Saturated fatty acid

a) P iii Q iv R i S ii

b) P iii Q i R iv S ii

c) P iv Q iii R i S ii

d) P iv Q iii R ii S I

4. Match the terms in column-I with suitable terms in column-II.

Column – I Column – II

P Glucose i Stored food in plants

Q ellulose ii Reserve food in animals

R Starch iii The plant cell wall

S Glycogen iv Most widely used in respiration

a) P iv Q iii R ii S i

b) P iv Q iii R i S ii

c) P iii Q i R iv S ii

d) P iii Q iv R ii S i

5. Match the terms in column-I with suitable terms in column-II.

Column – I Column – II

P Glycosidic bond i Triglycerides

Q Ester bond ii Dinucleotide

R Peptide bond iii Disaccharide

S Phosphodiester bond iv Dipeptide

a) P i Q iii R ii S iv

b) P iii Q iv R i S ii

c) P iii Q i R iv S ii

d)P ii Q iv R iv S iii

6. Match the terms in column-I with suitable terms in column-II

Column – I Column – II

P PGAL i The plant cell wall

Q Oleic acid ii Plasma membrane and membrane of organiles.

R Glycerol iii Unsaturated fatty acid

S Phospholipid iv Phosphate aldotriose sugar

T Cellulose v Trihydroxy alcohol

a) P v Q iv R i S ii T iii

b) P iv Q v R ii S i T iii

c) P iii Q iv R ii S v T i

d) P iv Q iii R v S ii T i

7. Which the following is the word regarding steroids is not correct?

a) Cortisone b) Progesterone

b) Glycolipid d) Ergosterol

8. Which of the following statement regarding to properties of starch is not correct?

a) Present of amylose and amylopectin chains.

b) Stored food in plants.

c) Soluble in water.

d) Not sweet.

9. Which one of the following pairs is not correctly matched?

a) Triose sugar->Glyceraldehyde ->Aldo sugar.

b) Pentose sugar ->Ribulose ->Keto sugar.

c) Hexoses sugar->Fructose ->Aldo sugar.

d) Triose sugar->Dihydroxy acetose ->Keto sugar.

10. Which the folowing pair regarding to biological importance of carbohydrates is not correctly matched?

a) Cellulose->Forms the plant cell wall.

b) Glycogen ->Reserve food in animals.

c) Ribose sugar->Structural components of ATP.

d) Galactose->The most widely used in respiration.

11. Which the following regarding to examples of Keto sugar is not correctly?

a) Fructose b) Ribulose b) Ribose sugar d) Dihydroxy acetose.

12. Which of the following pairs is not correctly matched?

a) Butter – Glycerol + 3 Fatty acids.

b) Waxes – Monohydroxy alcohol + 1 Fatty acid.

c) Cortisone – Present of –COOH or >C=O group.

d) Glycolipid – Glycerol + Lipid.

13. Which of the following option is not correctly for this molecule?

a) It is Keto hexoses sugar. b) Hydrolysis of a molecule of maltose

c) It can pass through the cell membarane d) Found in the juice of fruits.

14. Which one of the following pairs is not correctly matched?

a)Galactose – Lactose

b) Fructose – Glucose

c) Fructose – Galactose

d) Ribose – Deoxyribose.

15. Which one of the following pairs is not correctly matched?

a) Triose sugar – DHAP.

b) Starch – amylase and amyloprectin.

c) Phospholipid – plasma membarane.

d) Cortisone – sterols.

16. Which one of the following pairs is correctly matched?

a) Fats->Long saturated Fatty acidss chain.

b) Derivatives of Lipid ->Vitamins A, D, E.

c) Deoxyribose->RNA.

d) Glycogen ->Forms the plant cell wall.

17. Lipids are relatively insoluble in….

a) Chloroform b) Water

b) Benzene d) Ether.

18. Which of the following statement regarding the Fatty acid is not correct?

a) Unsaturated fatty acids are two successive carbon atoms at certain places therein are linked by a double bond.

R : Lipids such as wax form a protective layer on the outer surface of the aerial plant organs.

(a) (b) (c) (d)

48. A: In the structure of oils, a molecules of three fatty acids and one glycerol.

R : In the structure of oils only one Glycosidic bond.

(a) (b) (c) (d)

49. A: The subcutaneous fat layer under the skin, which maintains body temperature.

R : Lipid form an insulating layer.

(a) (b) (c) (d)

50. A: In plants food is stored as starch.

R : Starch is made up of amylase and amylopectin.

(a) (b) (c) (d)

51. A: In fish liver oil, glycerol is present as alcohol.

R : Glycerol are monohydroxy alcohol.

(a) (b) (c) (d)

52. Which of the following group is not organic group? [AIPMT 2010]

a) Fats, Proteins , Enzymes, Hormones.

b) Co-factors, Hormones, Water, Minerals.

c) Proteins, Carbohydrates, Nucleic acid, Hormones.

d) Proteins, Carbohydrates, Fats, Enzymes.

53. The middle Lamella is made up of…… [CBSE AIPMT 2009]

a) Muramic acid b) Calcium pectate

c) Phosphoglycerol d) Hemicellulose.

54. The chemical formula of starch is…… [RPMT 2002]

55. Find out the wrongly matched pair[Kerala PMT 010]

a) Primary metabolite – Ribose.

b) Secondary metabolite – Insulin.

c) Protein – Insulin.

d) Cellulose – Heteropolymer.

56) Chitin is a…… [WB JEE 2010]

a) Polysaccharide

b) Nitrogenous polysaccharide

c) Lipoprotein

d) Protein

57. In a polysaccharide, the individual monosaccharides are linked by a…… [AMU(Med) 2011, Kerala PMT 2011]

a) Glycosidic bond

b) Peptide bond

c) Ester bond

d) Phosphodiester bond

59. Carbohydrates are commonly found as starch in plant storage organs which of the following five properties of starch make it useful as a storage material? [CBSE PMT 2008]

P. Easily transported.

Q. Chemically non reactive.

R. Easily digested by animals.

S. Osmotically inactive.

T. Synthesized during photosynthesis.

a) P, R and T b) P and T

c) Q and R d) Q and S

59. Match the items in column-I with items in column-II and the correct answer. [Kerala PMT 2006]

Column – I Column – II

P Triglyceride Animal hormones

Q Membrane lipid ii Feathers and leaves

R Steroid iii Phospholipids

S Wax iv Fat stored in the form of droplets.

a) P iv Q iii R i S ii

b) P iv Q i R iii S ii

c) P iii Q iv R i S ii

d) P iv Q i R ii S iii

60. Find out the correct combination …. [GSEB 2011]

i) Triose sugar – Ribose.

ii) Starch – amylase and amylopectin

iii) Plasma membarane – phospholipid

iv) Malanin – sterols

v) Pitutary hormones – peptide.

a) Only ii, iii and iv

b) Only I, ii and iii

c) Only I and iii

d) Only ii, iii and v

61. Generally protein and carbohydarte components are found in cow milk… [KCET 2005]

a) Albumin, Lactose

b) Globulin, Casin

c) Casin, Lactose

d) Casin, Fructose

62. Starch and Cellulose are the compounds made up to many units of…… [CPMT 1988, 89, 93, 2009]

a) Simple sugar

b) Fatty acid

c) Glycerol

d) Amino acid

63. Which of the following is the characteristic of plants… [MP PMT 2003]

a) Glucose and Cellulose

b) Pyruvic acid and Glucose

c) Cellulose and Starch

d) Starch snd Pyruvic acid

64. Most common monomer of Carbohydrate is…… [Orissa JEE 2008]

a) Glucose b) Fructose

c) Sucrose d) Maltose

65. Lipids are insoluble in water because lipid molecules are…… [CBSE PMT 2002]

a) Neutral b) Zwitter ions

c) Hydrophobic d) Hydrophillic

66. Given below is the chemical formula is…… [Kerala PMT 2007]

68. Which of the following is not a disaccharide? [D PMT 2007]

a) Maltose b)Starch c) Sucrose d)Lactose

69. The repeating unit of Glycogen is…… [WB JEE 209]

a) Fructose b) Mannose c) Glucose d) Galactose

70. Maltose are insoluble in…… [PMT 2000]

a) Water b) Alcohol c) Acid d) Basic

71. Which is an organic component found in most cells? [DPMT 2009]

a) Glucose b) Lignin c) Sodium chloride Oxygen

Biomolecules – II

IMPORTANT POINTS

Proteins are important compound of cytoplasm. They consist of C, H, O, N and S. Proteins are soluble in water but keratin is insoluble in any solvent .The structural unit of protein is amino acid. They are linked with the help of peptide bond. There are 20 types of amino acids in living organisms. They possess an-NH2 group,a-COOH group, an ‘H’ and a ‘R’ group.They differ from each other in the composition of their ‘R’ group. It is amphoteric in nature. Structurally proteins are classified in to four types. All enzymes are made up of protein. When protein becomes associated with some materials other than amino acids they are known as conjugated proteins.

Nucleic acids consist of C, H, O, N and P. Each nucleotides is made up of a pentose sugar, nitrogen base and phosphoric acid. DNA & RNA are example of nucleic acids. Uracil is not in DNA and thymine is not in RNA. There are three types of RNS.

Specific chemicals which act as biological catalysts are called enzymes. Chemically enzymes are protein. Sometimes an enzyme is also poses a non protein part. In such type of enzyme protein part is known as apoenzyme and non protein part is called cofactor. Prosthetic group tightly bound with them and coenzyme are loosely bound with them. Enzymes are classified in to six categories on the basis of biochemical reactions catalyzed by them

(1) Which of the following cell organelle is stored the information of synthesize Proteins?

(a) Mitochondria (b) Nucleus (c) Chloroplast (d) Cell membrane

(2) Which of following elements are stored the information of Proteins?

(a) Lipid (b) Polysaccharide(c) Amino acid (d) Nucleic acid

(3) Find out the Miss matched pairs:

(a) Protein – important compounds of nucleus

(b) Nucleic acid – major components of chromosomes

(c) Amino acid – an amphoteric compound

(d) Enzymes – Colloidal catalysts

(4) Which of the following are linked together to form Proteins ?

(a) Phosphate (b) Nitrogen base (c) Sugar (d) Amino acids

(5) Which one of the following is incorrect for Protein:

(a) They transport some nutrients across cell membrane

(b) They are heteropolymer of amino acids

(c) They possess C, H, O, N and P in their constitution

(d) They are very important compounds of cytoplasm

(6) Total numbers of amino acids are involved in protein synthesis in Plants:

(a) 10 (b) 22 (c) 13 (d) 20

(7) Which one is the most abundant protein in the animal world?

(a) Collagen (b) keratin (c) RUBISCO (d) Hemoglobin

(8) Full form of RUBISCO is:

(a) Ribulose Bisulphate Carboxylase Oxygenare

(b) Ribuose Biphosphate Carboxylase Oxygenare

(c) Ribuose Bisulphate Carboxylase Oxygenare

(d) Ribulose Biphosphate Carboxylase Oxygenare

(9) Match the items in column – I with appropriate items in column – II and pick up correct ans